Cutter.



L. W. BUGBEE.

CUTTER.

APPLICATION FILED APR. 10, I916.

Patented Oct. 24, 1916.

WIFE

WITNESSES /'Q I I am I W IQE- v LUCIAN VT. BUGBEE, 0F SOUTHBRIDGE,MASSACHUSETTS, ASSIGNOR TO AMERICAN OPTICALCO MPANY, OF SOUTHBRIDGE,MASSACHUSETTS, A VOLUNTARY ASSOCIA- TION OF MASSACHUSETTS.

Application filed April 10, 1916. Serial No. 90,129.

To all whom it may concern:

Be it known that I, LUCIAN W. BUGBEE, a citizen of the United States,residing at Southbridge, in the county of Worcester and State ofMassachusetts, have invented certain new and useful Improvement inCutters, of which the following is a specification.

This invention relates to improvements in lens cutting machines, and hasparticular reference to improvements .in the tool spindle and associatedparts forming the to satisfactorily operate upon different ourvatures oflenses when desired.

Other objects and advantages of my improved construction should bereadily apparent by reference to the following specification taken inconnection with the accompanying drawings forming a part thereof,

and it will be understood that I may make any modifications in thespecific details of construction shown and described Within the scope ofthe appended claims without departing from or exceeding the spirit of myinvention.

Figure I represents a fragmentaryview of a lens cutter equipped with myimproved construction. Fig. II represents an enlarged sectional view ofmy cutter head. Fig. III represents a section View on the line IIIIII ofFig. I. Fig. IV represents a diagrammatic view of the adjustment foroperating on concave surfaces. Fig. V represents a similar view of theadjustment for operating on convex surfaces. Fig. .VI represents asimilar view when used in connection with plano surfaces. Fig. VIIrepresents a view at right angles to Fig. VI.

In the drawings, in which similar characters of reference are employedtov denote Specification of Letters Patent.

CUTTER.

Patented Oct. 24. 1915 corresponding parts throughout the several views,the numeral 1 designates the main frame of the cutter, carrying theswinging arm 2 in which is mounted the tool spindle 8 ,'these partsbeing'of any desired construction, although being illustrated as theconstruction shown in my patent 1,187,034 of June 13, 1916, of which thepresent application is a division.

Carried by the lower end of the spindle 3 and movable therewith underthe guidance of a suitable pattern as the latter is rotated, is the toolor cutter for operating on the lens or other device 1 carried by thetable 5. In thecutting or marking of glass for example, it' has beenfound the most efficient results can be obtained when the cutting ormarking point is substantially normal to the surface being operatedupon. Prior to this invention it has, therefore, been necessary toeither employ a plurality of machines for operating on differentsurfaces, such as concave, convex and the like, or else to mount thecutting point for pivotal movement. The first form is disadvantageousfrom a viewpoint of expense, while the latter involves a looseness andconse quent liability of insecurity of parts. The present machine,however, does away with the various difiiculties hitherto experienced.

Carried by the lower end of the spindle 3 is a head 6 having its lowersurface cut at an angle, while fitting tightly against said lowersurface is the supplemental head 7 rotatablymounted on the stud 8, thetwo heads6 and 7 being rigidly held in desired adjusted relation by thedowels 9, a spring 10 forcing the two normally together by permitting oftheir disengagement by direct pull sliding the dowels out ofinterlocking relation, after which the two parts may be relativelyrotated around the stud 8. Carried by the said head 7 are a plurality ofshanks 11 each bearing a cutting point 12 which may be either a diamondor other desired cutter or marker. In the case of the diamond the sameis mounted in a segment of a sphere 13 whose curvature has as its centerthe operating point, the said portion 13 being secured in the end of theshank 11 as by soft solder or the like, whereby heating vvill servetosoften the attachment and allow of adjustment of the cutter relative tothe shank to vary its angle without varying. the position ofthepointwhich.

is at all times in line with the axis of the shank. 5

It will be noted by reference to the drawings that the shanks are sodisposed that when the head 7 is thrown to bring one of purposes ofillustration three having been shown; onewith a point set in position tobest operate onconcave surfaces,- a second set to best operate on convexsurfaces, and

the third being arranged for plano surfaces. To further increase theefficiency of the machine, however, as when one of the points 12 hasbeen dulled or broken, or for some other reason it is undesirable toturn the head 7 or in those events where it is desired to use but asingle tool orcutting member in placeof the three, the head 6 isprovided with a tubular portion or sleeve 16 fitting over the lower endof the spindle 3 and being locked against accidental rotation thereon asby means of the slot '14 and pin 15 or any mechanical equivalentthereof.

The purpose and advantages of this construction will be-best understoodby reference to- Figs. III to- VII inclusive, from which it will benoted that there are four of the slots l i so that the head 6 and shank3 may be locked with four different relative adjustments, three of theseadjustments being preferable in actual use. These adjustments may besuitably designated on the tubular portion 16, for convenience andunderstanding the same being indicated at the side of the sleeve inFig.III, it being understood that these designations are in practice placeddirectly on the sides of the sleeve. As previously mentioned, the point12 is disposed at an angle, as illustrated in Figs. IV, V and VI. WVhenit is desired to cut a concave" surface the head 6 is suitablyadjustedon the spindle 3 tobring the point into the position indicatedin Fig. IV, or substantially normal to the concave surface.

NVhen cutting a convex surface or marking the same the head 6 is given ahalf rotation bringing the point into the position shown in Fig: V, theposition of the point as be fore mentionedbeing axial at all times withthe spindle 3 so that the 'size of the device circumscribed and thepositionof the point is in nowise varied by said adjustment. When it isdesired to cut a plano surface, buta quarter turn adjustment is given,this bringing the point normal, as indicated in Fig; VI, the head beingpreferably so set, however, that the point trails, as indicated in Fig.VII,rather than digging in as would be the case where the head revolvesthrough an arc of. 180 degrees from the position indicated in Fig. VII.It will thus be seen be seen that I have provided an extremely compact,efficient and desirable construction,

in which a plurality of cutting pointsare provided, any one of which maybe shifted into operative position either by movement of the lower toolbearing head, or turret member, or by movement of the complete devicerelative to the spindle without change of points. By these slightadjustments cutting of convex, concaveor plano lenses may be readilyaccomplished without in anywise varying the size of lens cut when underguidance of a certain style of former, and that I have consequentlyprovided a novel and extremely efiicient form of machine for the desiredpurpose.

I claim:

1. In a device of the character described, the combination with the toolarm, of a head carried thereby, a second head mounted for rotativeadjustment relative to the first, and a plurality of tools carried bysaid second head and provided with cutting points, said tools being soarranged that the operative point of each when in one-adjusted positionwill lie in axial alinement with the main tool spindle, substantially asand for the purpose described.

2. In a machine of the character described, the combination with a toolspindle,

of a head carried thereby, and rotatableabout the axis thereof, a toolshank carried by the head and having a tool angularly mounted thereon,the point of the tool extending into alinement with the axis of the toolspindle extended, means for locking the head and tool at a plurality ofpoints about the axis of the tool spindle, and means for indicating theresult of said adjustment.

3. In a machine of the character de-,

, head, each of which may be brought into the same predeterminedrelation to the tool spindle by relative rotation of the head, and meansfor rotating the two heads in unisonabout an axis at an angle to that ofthe stud, substantially as and for the purpose described.

4. In a device of the character described, the combination With a toolspindle, of a main head rotatably mounted on the spindle, means forlocking the main head at any one of a plurality of positions on saidspindle, an auxiliary head carried by the main head, and turning aboutan axis intersecting the axis of-the spindle, and a plurality of cutterscarried by the auxiliary head and adapted to be moved into axialalinement With the spindle upon suitable movement of the auxiliary headsubstantially as and for the purpose described.

5. In a device of the character described, the combination With a toolspindle, having a former engaging portion and a main head, of anauxiliary headcarried by the main head and mounted for movement about anaxis different from the axis of the spindle, and a plurality of cutterscarried by the last mentioned head and so disposed in the head that theoperative portion of each cutter will at one adjustment of the head bebrought into axial alinement With the spindle, substantially as and forthe purpose described.

In testimony whereof I afiix my signature in the presence of twoWitnesses.

LUOIAN W. BUGBEE.

Witnesses:

EDITH M. HALvoRsEN, ESTHER M. SHERIDAN.

Copies of this patent may be obtained for five cents each, by addressingthe "Commissioner of Patents Washington, D. 0.

